When the outside dose rate and the transmission factor are given, use the formula ID = TF x OD to

determine the inside dose rate. When the inside dose rate and transmission factor are known, the outside

dose rate can be determined using the formula:

Examples of the use of these formulas follow:

a.

What is the transmission factor of a bunker when the OD is 200 cGyph and the ID is 25

cGyph?

Solution:

b.

Personnel will be crossing a fallout area in M1A1 Tanks. TF is 0.04 and the OD is 360

cGyph. What is the inside dose rate?

Solution: ID = TF x OD = 0.04 x 360 = 14 cGyph.

c.

Personnel are located inside a fallout area and have taken shelter in an underground

bunker with 3 feet of earth overhead cover. The ID is 0.5 cGyph and the TF is .0002.

What is the OD?

Solution: